This the last of our five-week series in honor of 500 years of Reformation. The last "Sola" (or "soli," in this instance) is really the heart of all the others: Soli Deo Gloria. Glory to God alone. Johann Sebastian Bach put "SDG" on all of his works to write this refrain on everything he did. But what exactly did the Reformers mean when they emphasized this and why do some consider it the lifeblood the Reformation?
